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  <title>Document</title>
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    // 基于准备好的dom，初始化echarts实例
    var myChart = echarts.init(document.getElementById('main'));

    // 指定图表的配置项和数据
    var option = {
      xAxis: {
        data: ['A', 'B', 'C', 'D']
      },
      yAxis: {},
      series: [
        {
          name: '销量',
          type: 'bar',
          data: [100, 120, 90, 150]
        },
        {
          name: '库存',
          type: 'line',
          data: [120, 110, 100, 130]
        }
      ],

      tooltip: {
        trigger: 'axis'
      },

      title: {
        text: 'abcd'
      }
    };

    // 使用刚指定的配置项和数据显示图表。
    myChart.setOption(option);
  </script>
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